Witco, Inc.

Protomatic Aerospace

Protomatic Aerospace is a CNC state-of-the-art precision machining facility. At our spacious and highly advanced facility, we produce a large variety of aero structures and machine parts for light commercial aircraft to space vehicles for the defense industry. 


Protomatic Aerospace capabilities include 3-, 4-, and 5-axis aerospace CNC milling; 2- and 3-axis CNC turning; and 8-axis CNC multi-axis mill-turn.


Our experienced team of engineers and craftsmen make sure each and every part is efficiently designed and machined and inspected to perfection.

Prosper-Tech Machine & Tool, LLC

Prototype thru production precision machine shop providing CNC machining services for the defense, aerospace, space and medical industries. AS9100/ISO 9001:2015 Certified, WOSB/WBENC, NIST 800-171 Compliant, DFARS, ITAR Registered, JCP Certified. Cage Code 5CJF8/Primary NAICS 332710.


Manufacturing capabilities: CNC machining including 3-5-Axis Milling & 6-Axis Mill-Turn, Sinker EDM and Laser Engraving.


Core competencies: Quick turnaround times utilizing automation, personalized customer approach, skilled workforce of machinists and engineers who excel at complex problem solving.


Located in Macomb County, Michigan. Experienced machining aluminum, stainless steel, steel and nickel parts.

PCMI Manufacturing Integration

At PCMI, we specialize in casting solutions for prototypes and mid-volume production through the machining of carbon fiber, iron, steel, and magnesium alloys. Our solutions include: cost effective die cast tooling and prototypes, production of aftermarket prototypes, and die cast production that includes full CNC machining.


We are a reliable, single-source provider, and we help clients reduce costs while maximizing product quality. Single-source also means single point of contact, so we provide efficient and effective communication with our clients.


We pledge to ensure thorough technical reviews, maintain the latest quality equipment, and provide continuous, comprehensive training to remove all risk associated with not meeting part conformity to print specifications.


All of our data is maintained through secure in-house servers, as well as encrypted online cloud-based traceability for every part we produce.

Spearpoint Manufacturing, LLC

Founded in 2021 by Mechanical Engineer and Machinist, Jon Pishney, Spearpoint Manufacturing specializes in precision CNC machining utilizing the latest techniques and technology. At Spearpoint, we believe in combining our experience with high quality machine tools to serve you best. When you need a manufacturer to trust with your most critical machined parts, Spearpoint can be your value-added partner every step of the way from prototype to production.


We are ISO9001:2015 compliant and ITAR registered.

Delta Research Corp.

Thread-Craft Inc.

Thread-Craft, Inc. is a manufacturer of mechanical linear movement actuators such as ball screw assemblies, acme or lead screws, roller screws and precision spindles. Our machining expertise also involves special tool holding devices and precision machine details. We are a full-service repair facility, capable of evaluating and repairing or remanufacturing products to OEM specifications. In addition, we offer precision machining, grinding and thread grinding services. 


Lloyd E. Johnson and Ture A. Lindholm founded Thread-Craft, Inc. in the early 1950s. Originally employing three people, Thread-Craft, Inc. occupied a total of 1,000 square feet. The initial product line consisted of threaded plug and ring gages and a thread grinding service. Thread-Craft, Inc. was relocated in 1956 to a 3,000-square-foot facility in Warren, MI . In 1958 Thread-Craft, Inc. was incorporated. 


Early in the 1960s, the majority of work consisted of worms, multiple starts, repair and new manufacture of acme screws More... and nuts thread grinding, turning and milling, and ID/OD grinding. Jobs made complete to print began to make up a large percentage of Thread-Craft's work in the mid to late 1960s. Three thousand square feet were added to the facility in 1967 in order to compensate for Thread-Craft, Inc.'s rapid growth and expanding product line.


 In the 1970s, gages were removed from the product line and the focus became machine tool oriented. Lloyd E. Johnson bought Ture A. Lindholm's shares in 1979 and became the sole owner of Thread-Craft, Inc. The following year he rented a 3,000-square-foot manufacturing plant located next to the existing facility to accommodate newly acquired turning and milling equipment. Lloyd E. Johnson retired in 1984 and was succeeded by Dennis L. Johnson as president. Thread-Craft, Inc.'s vision and commitment to quality continued.


 During the 1980s, Thread-Craft, Inc. experienced continued growth due to the ability to provide superior quality machine tool components such as machine spindles, lead screws and nuts, fixtures, and a variety of other machine tool details quickly and accurately. Ball screw assemblies were added to the product line in 1988. Special machinery and equipment was purchased to manufacture the assemblies. By 1993 it was apparent that Thread-Craft, Inc. would need an additional 3,000-square-foot rental building to assemble and package the product.


 By 1994, Thread-Craft, Inc. could no longer continue to grow in its 12,000-square-foot facility. The process of planning a new facility had begun. It was determined that the office and manufacturing space would need to double, and production machines and material handling aids such as overhead cranes would be necessary. In designing the new manufacturing space, the company emphasized employee health and comfort, including climate control and a state of the art air purification system.

XL Machine Company, Inc.

Founded in 1976, XL Machine Company began as a quality, prototype machining center.


Today, this core function is paired with a more complete, large-capacity production facility. XL Machine operates in a 67,000 sq ft facility in Three Rivers, Michigan and continues to grow with additions of permanent tooling and precision production equipment.

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Suppliers of CNC Machining specializing in Engineering Services: Milling 5+ axis for Aerospace located in (Michigan, United States)

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